Latch device



pril 12, 1932. H. ELLIOTT 1,854,123

LATCH DEVlCFI Filed Sept. l, 1928 TS Sheets-Sheet vl H. ELLIOTT April 12,. 1932.

LATCH DEVICE 3 Sheets-Sheet Filed sept. 1L, 1928 H. ELLIOTT LATCH DEVICE April 12, 193,2.

Filed Sept. 1, 1928 3 Sheets-Sheet 3 i "KJ Patented Apr. 12, 1932 HENRY ELLOTT 0E HLLHEAD GLASGQW., SCOTLND LATCH DEVICE ,Application led September 1, 1928, Serial No. 303,554, and in Great iritain September 19, 1927.

rlhis invention has reference to latches and latch fittings for windows and the like and particularly to latches or fittings of the type having e retainiilg holt and .a trigger bolt in combination with a plate having holes therein and ineens to engage with vthe trigger bolt when the window or the like is partly opened or closed. Such cro-operation with the trigger bolt releases the retaining bolt which enters a hole in the plate and thereby prevents further opening of the window or the like until the retaining bolt has been manually withdrawn- My invention has for its object to provide "T an improved and simplified latch which will be cheap to manufacture, and sensitive'and positive in its operation.

lAnother object of my invention is to provide an improved plate with holes therein and trip to co-operate withv the trigger bolt. A still further object of my invention is to prevent unauthorized interference with the latch and thereby prevent the 4 window or the like being opened by intending intruders. in order that my invention will be properly understood l heve hereunto appended three explanatory sheets of drawings illustrating preferred constructions of latch fittings in accordance with my invention and their application to windows and whereonzfr Figure 1 illustrates latch fittings in accordance with my invention as applied to a window of the sliding Asash-type, the window being shown closed and` secured,

Figure 2 is an end elevation of said fittings.

Figure 8 is a view similar to Figure 2 but showing the windo-w partly open and secured.

Figure 4 is a plan view of Figure 1.

Figure 5 is a plan view of the latch with cover shown in section and the retaining bolt in the operative or securing pesition.

Figure is a view similar to Figure 5 but showing the retaining bolt in an inoperative position.

Figure 7 is an end elevation of Figure 6 and Figure 8 a plan view of Figure 5, the casing in said figures being shown in section.

Figure 9 illustrates the improved fittings as applied to a window of the `easement type.

Figure 10 is a plan view thereof, the wing dow being shown in two open positions by the dotted lines. i Figure 11 is a perspective view of tlielatch fittings as applied to a window of the casement type. f l

Figure 12 is a perspective view of lthe trip used in vcombination with my improved latch as epplied to a Window of the oesememt type- Figures 13 and 14C illustrate an inverted plan view of a modiiied type of latch in accordance-with my invention, the basevof the casing being omitted. Y

Figure 15 illustrates in perspective a some.,- what modiiied latch applied to a window having joggles.

Referring to the ,draWings:-

l a is the sliding retaining bolt, y the sliding trigger bolt and c a pivoted rocking inember all housed within a casing el; l

The retaining bolt a is recessed 3ft, @l toform an abutment a2 which engages lan angled arm 01 of the rockingrlnember as indicated clearly in Figures 5 and 6. Said bolt carries a pin e having a ring end which encloses a pin e1, which latter is ,encircled by the helical spring e2. Said spring, by acting on the head of the pin e tends to force the retaining bolt into its outer or operative position as clearly shown in Figure 5. 1 f v The slidingl trigger bolt b is provided with a V like endand is further provided with two laterally turned notched abutments `b1 b?. The rocking plate c is pivoted at c2 to the back of the -casing c Z `and in addition tothe angled arm c1 is provided with three cam like iingers c3 c4 and c5. A cord or the like f, Figures 1, 2 and 8, is secured to the end of the arm c1 which passesuthrouighY a slit inthe side of the casing d. i 'A Reference will now be made. to the fittings as applied to a window of the sliding sash type and illustrated in Figures 1to4.

As applied to windows of the sliding sash type said latch is secured to the lower sash of the window While to the side of the upper sash is secured a plater g having two'hole's h h1 cut therein, said holes corresponding to and registering with recesses cut in the upper sash. To the 'side of said plate is 4secured a 'ifo trip or abutment forming two oppositely inclined faces jl which make an angle preferably greater than a right angle to each other. Said plate is provided with a longitudinally extending lip or bead g1.

In operation, when both sashes are in the closed position the sliding retaining bolt a is normally in the forward position and fit" ting into the recess 7L in the plate g and cor responding` hole in the upper sash by which mea-nsboth the upper and lower sashes are secured.

'Should it be desired to either raise the lower sash or lower the upper sash the cord or the like f is pulled. rlhis results in the rocking member c being turned about its pivot 02 and, by reason of the angled arm c1 bearing on the abutment a2 the retaining bolt is drawn inwardly against the action of the spring e2.

When the retaining bolt is fully withdrawn the angled edge of arm c1 by bearing on the said abutment a2 retains the retaining bolt in such position against the action of the spring e2, see Figure 6.

During said movement of the retaining member the cam like finger c4 engages with the laterally extending projection b1 and thereby moves the trigger bolt outwards into the position shown in Figure 6.

The lower sash can now be raised or the upper sash lowered, either of said move- 'ments resulting in the inclined face j abut ting against the trigger bolt Z) which is consequently forced inwards. In doing so the abutment b2 bears against the linger' c5 and thereby imparts a partial rotary movement to the rocking member about its pivot which results in the angled edge of the arm c1 being moved sufficient to permit of the retaining bolt being moved outwards under the action of the spring e2.

On either of the windows being opened further the retaining bolt shoots into the hole h1 provided in the plate g and corresponding recess in the sash of the upper frame thereby effectively preventing any further movement of the two sashes relative to each other.

To close the window the cord or the like f is again pulled to withdraw the retaining bolt and move forward the trigger bolt and, on the window being closed, the trigger bolt bears on the inclined face jl so that the retaining bolt again shoots forward and shoots into the lower hole 7L and corresponding recess in the upper window sash when in alignment therewith, thereby securing the window. Thus if the window is closed it is automatically secured and if opened it is automatically secured when the retaining bolt registers with the hole h1.

If desired the underside outer end of the retaining bolt may be bevelled or angled so that, when in engagement with the upper hole h1, it will be automatically moved in to its inoperative position on either the upper or lower sash being moved to close the window.

Finger c3 prevents the trigger bolt slipping out and further ensures that it is kept in the relative position to its rocking plate.

lf desired a second trip or inclined face arranged to (3o-operate with the trigger bolt may be located at a level higher than the opening h1, so that, should the retaining bolt be withdrawn from said hole 71,1 and the window further opened the retaining bolt is again released. lV hen opened to such extent, however, it will be apparent to the eye that the window is opened to too great an extent to be safe against unauthorized intruders and whenever the window is closed to what may be regarded as a safe extent the retaining bolt again shoots into hole h1 and `prevents further opening of the window.

The lip or bead g1 serves to prevent a knife or other tool inserted between the glass of the lower sash and the lower rail of the upper sash from being introduced between the end of the retaining bolt and the plate g as to interfere with the functioning of the latch.

By reason of both the retaining bolt and the trigger being arranged to slide as herein set forth a securing device of very compact, simple and strong construction is obtained.

The securing device may be applied to windows` of the easement type and also to doors, fanlights and the like. In Figures 9 to l2 the securing device is shown applied to a easement window. ln said ligures the latch is exactly similar to that set forth for use in windows of the sliding sash type but the co-operating trip is slightly modified. In said figures the latch is shown applied to the window frame while the trip is applied to the hinged sash, but the arrangement may be reversed.

On the upper batten of the Casement window is secured a horizontal plate s which may be formed integral with a vertical plate S1.

Plate s is provided with two oppositely inclined faces t t1 and also with an opening u which registers with a corresponding recess formed in the top of the batten.

When the window is closed the retaining bolt bears against or is directly in front of the upper batten and thereby prevents the window being opened.

On the cord or the like f being pulled the retaining bolt is withdrawn clear of the door while the trigger bolt is moved in front of the inclined face 251.

On the window being opened said inclined face actuates the trigger bolt which, as previously explained, releases the retaining bolt which drops into the hole u thereby securing the window in a partly open position.

To open the window further the retaining bolt is withdrawn and the trigger moved outwards, the inclined face t peri'nitting of such movement. The window can then be opened to any further extent found desirable.

On closing the window the inclined face t co-operates with the trigger bolt so that the retaining bolt is again released to move forward under the action of its spring but the hole u is so positioned with respect to the inclined face t that the bolt cannot drop into the hole L but bears on the plate s until the window is fully closed when it moves into its securing position in front of the top batten.

The front plate 81 prevents the insertion of a tool to interfere with the retaining bolt when the window is partly opened and locked.

The latch may be somewhat modified as shown in Figures 13 and 11i wherein the retaining bolt a is loaded by helical spring n and trigger bolt b 'by helical spring p and the rocking member c is provided with two limbs o 01. The operating cord f is attached to the retaining bolt, the inner end of which is bent over and the bent over end al recessed or notched as indicated at 02 to receive the limb 01. The other limb o is provided with cam like face g with which the inner end of the trigger bolt co-operates. V

The pin g1 carried bythe trigger bolt Z9 is arranged to bear against the pin g2 carried by the rocking member when said bolt is in its outer position, the spring p tending to tilt the rocking member.

In Figure 13 both of the bolts are shown in the forward position.

0n pulling the operating cord the retaining bolt is withdrawn until the notched end thereof clears the end of the limb 01 thereby releasing the said limb 01 which is then tilted by the action of the spring p, moving to a position under the notched bent over end a1 of the retaining bolt, thereby holding the bolt in its inoperative position.

On the window being` moved so that the trigger bolt co-operates with a trip said bolt is moved inwards and its inner end co-operates with the cam like faces g of the rocking member thereby tilting the latter so that the limb 0l registers with the not-Ch of the bent over end of the retaining bolt a thereby permitting said bolt to shoot forward under the action of the spring n. Such construction of latch may be still further modified by providing a notch s in the limb 01 which recess receives the notched end of the retaining bolt when the latter is in its closed position.

Before the retaining bolt can be withdrawn it is necessary that the rocking member should be tilted so that said notch is clear of the trigger bolt this being conveniently effected by means of a cord or the like 7* attached to the rocking member. When this is done the operating cord can be pulled to withdraw the retaining bolt. By such modification two distinct operations are necessary to withdraw the retaining bolt thereby rendering tampering withv` the l ing such that ifjthe retaining bolt is not perl mitted to shoot home to the full extent the second notch will operate to engage Vthe retaining bolt.

If desired a' key operated lock may be provided to positively lock the latch fittings in Vthe securing position.

In Figure l5 the lower sash is provided with a joggle fu which would prevent they application thereto of a latch fitting as illustrated in Figures 5 to 8. For such windows the latch fitting is modified by shortening the bent arm c1 and providing a short arm 'U2 rigidly secured to the pivot pin c2 to which the rocking member is also rigidly secured.

The operating cord y is secured to the arm o2 and the latch operated as herein described.

It will be noted that there is no projecting arm which will foul the joggle fv.

What I claim is 1. For securing windows and the like a latch comprising a casing, a. longitudinally sliding retaining bolt and a longitudinally sliding trigger bolt, both located in said casing, a. rocking member pivoted to the casing and arranged to co-operate with said two bolts and means to withdraw said retaining bolt to an inoperative position or non-securing position, and retain it in such position until the trigger bolt is actuated, in combination with a plate provided with holes therein, and a trip comprising two oppositely inclined faces adapted to co-operate with the trigger bolt and to move same longitudinally when the retaining bolt is in an inoperative position, so that the latter is moved longitudinally into an operative position to engage one of the holes in said plate.

2. A latch for windows and the like comprising a casing, a longitudinally sliding spring loaded retaining bolt and a longitudinally sliding trigger bolt both located within the casing, a pivoted rocking member, said member having an arm arranged to cooperate with the retaining bolt and a finger arranged to co-operate with the trigger bolt, and manually operable means to rock said member, the said linger, when the member is so rocked, ejecting the trigger bolt and the arm retracting the retaining bolt and hold ing same in its retracted position until thel rocking member is operated by the trigger bolt co-op-erating with said finger.

3. A latch for windows and the like comprising a casing, a sliding spring loaded retaining bolt provided with a shoulder, a sliding triggerbolt having a pair of lugs, both'bolts being located within the casing between said bolts, said member having an arm Jie arranged to zo-operate with the shoulder and three ngers to (zo-operate with the two lugs, and manually operable means to rook said member, one of the said lingers, When the member is so operated, (ro-operating with one of the lugs and ejectng the trigger bolt and the arm (5o-operating With the shoulder and retracting the retaining bolt and holding it in its retracted position until the rocking member is operated by one of the fingers oooperating with a lug.

HENRY ELLIOTT. 

